NDLI: Optical CDMA-based wireless indoor positioning through time-of-arrival of light-emitting diodes

Content Provider	IEEE Xplore Digital Library
Author	Peng Wu Jie Lian Baowang Lian
Copyright Year	2015
Description	Author affiliation: Univ. of Virginia, Charlottesville, VA, USA (Jie Lian) \|\| Northwestern Polytech. Univ., Xi'an, China (Peng Wu; Baowang Lian)
Abstract	We propose a novel visible light wireless indoor positioning scheme based on optical-code-division multiple-assess (OCDMA) and time-of-arrival (TOA) principle. A set of three light-emitting diodes (LEDs) ceiling light fixtures are utilized to transmit their location information to a device, equipped with a photo-sensor, seeking to determine its own position. The three LEDs, sharing a common clock, transmit their coordinate information to the photo-sensor using a unique OCDMA spreading code previously assigned to them. A fixed point is adopted to compensate the time bias errors which derived from time delay and non-synchronized clock in TOA system. After receiving the three superimposed information bit streams, the receiver collects the TOA by measuring code phase information from each light and retrieves the coordinate information of each LED. Based on these processes as mentioned above, we show that the receiver will be able to accurately compute its own position. Simulations demonstrate that a positioning accuracy of less than 6.5 cmis achieved.
Starting Page	1
Ending Page	3
File Size	876015
Page Count	3
File Format	PDF
e-ISBN	9781467373739
DOI	10.1109/ICOCN.2015.7203712
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-03
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Integrated optics Light emitting diodes Adaptive optics Optical receivers Time of arriving (TOA) Optical transmitters Indoor optical positioning Clocks Optical code-division multiple-access (OCDMA)
Content Type	Text
Resource Type	Article

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